Improvement in exterior casings for turbine water-wheels



NrrEn STATES PATENT OFFICE.

' JOHN w. BOOKWALTER, OF srnmenmnn, OHIO.

IMPROVEMENT IN EXTERIOR CASINGS FOR TURBINE WATER-WHEELS.

' 'Specification forming part of Letters Patent No. 87,625. dated March9, 1869.

To alt whom it may concern:

VBe it known that I, JoHn W. BOOKWALTER, of Springfield, in the lcountyof Clarke and State of Ohio, have invented a new and useful Improvementin Portable Forebays or EX- ternal Gasings for Water-Wheels; and I dohereby declare that the following is a full, clear, and exactdescription ofthe same, reference being had to the annexed drawings,making part of this specification, in Which- Figure l is a perspectiveview. Fig. 2 is a vertical section, and Fig. 3 is a verticallongitudinal section.

The same letters in all the figures indicate identical parts.

My invention relates to portable metallic `'orebays or external casingsfor Waterwheels,

. A../and is especially designed for that class mof turbines which areinclosed in a casing colnposed of a cylinder and crown-plate withparallel flanges, between which are placed guideplates, which,"receiving the water horizontally, discharge it, centrally orvertically,

' through the Wheel, and into apipe leading into the tail-water.v

The external casing is made of cast-iron, and is in form an Oblatespheroid. This form gives the greatest diameter to that plane in which.the water ows upon the wheel, and, by reducingthe altitude, enables thecasing to be constructed with the least weight of metal. y

The casing is constructed in two parts, A and A', formed with flanges,by means of which the two parts can be bolted together. The lower partis formed With lugs C, through which bolts may pass, fastening it to theframe on which the portable forebay is to be supported. A tubularbearing, D, is formed in the bottom, the upper part of which, D',projects upward into the chamber, to receive Aand support the lowerflange of the wheelcasing.

As the tubular bearing is raised above the bottom of the externalcasing, the wheel and its case may be conveniently adjusted in positionbytaking hold of the [lange projecting over thetop of the bearing D.

The cylinder which` incloses the Wheel may conveniently be keyed inposition by driving Wedges between it and the downwardly-projectingportion of the tube D.

The Water enters through a pipe attached have been used for waterwhee1s.

to the Opening B, placed in the side of the external casing, and isdischarged through an opening in the bottom D, already described.

The top of the casing has, centrally placed, an opening at E, throughwhich the wheelshaft passes 5 and into this opening is fitted astuffing-box, F, to prevent the escape of Water around the shaft. Abridge, G, with movable cap, is cast or bolted upon thetop of the case,and properly nished to form a bearing for the shaft. An arm-hole, H, isplaced in convenient position, and closed by a cap held in position inthe usual manner. Another hole and stuffing-box are arranged for theintroduction of a rod to operate the gates when such a rod is employed.

I am aware that portable external casings These have generally beenmade, in Whole or in part, of wrought-iron, and in a cylindrical form,so that metal was Wasted, and the Weight to be handled increasedunnecessarily bycreating an extension of the water-chamber in adirection in which no extension Was required. I do not claim, therefore,a casing broadly, but

limit my claim tothe peculiarities of construction as invented by me.

What I claim as my invention, and desire to secure by Letters Patent, isV 1. As a new article of manufacture, a portable metallic forebay Orexternal casing for a turbine of the class mentioned, having a tubularbearing, D', projecting into the chainber for the support of theWheel-case, substantially as described.

2. Such a casing, combining in its construction the followingelements,viz:' two pieces which, When bolted together by their iianges,form an oblate spheroid; an induction-pipe, B, in the side, and aneduction-pipe, D, in the bottom, and an upper bearing 'for thewheel-shaft, substantially as described.

3. Such a casing, in combination with a stufling-box, F, and elevatedbox or bearing for the wheel-shaft G, attached to the top plate A,substantially as set forth.

In testimony whereof I have signed my y name to this specification inthe presence of tWo subscribing witnesses.

JOHN W. BOOKWALTER. Witnesses:

R. MASON, D. P. HOLLOWAYr

